Tandem type cylindrical lithium ion battery charging and discharging mechanism

Abstract

A tandem type cylindrical lithium ion battery charging and discharging mechanism comprises a rack, and the interior of the rack is divided into a left compartment and a right compartment by a vertical partition plate; three charging and discharging movement mechanisms are arranged in the left compartment, each charging and discharging movement mechanism comprises twelve needle beds which are flush with the battery trays up and down, and six needle beds form a group to be connected with a charging and discharging driving assembly in the right compartment in series; according to the device, a series charging and discharging method is adopted for supplying power to a high-voltage direct-current bus, so that the charging and discharging currents of the cylindrical lithium ion battery are highly consistent, and the capacity consistency in the battery manufacturing process can be improved; a series circuit is higher than a parallel circuit in applicable voltage, and cable heat loss is reduced; on the premise that the charging and discharging efficiency of the battery is not reduced, an inversion conversion link of converting direct current into alternating current is eliminated, the number of power devices and energy consumption are reduced, and the occupied space of equipment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of battery manufacturing, and in particular to a series-connected cylindrical lithium-ion battery charger and discharger. Background Art

[0002] As lithium-ion batteries are increasingly used, the production cost of lithium-ion batteries also restricts the ex-factory price of related products. Lithium-ion battery manufacturers are trying every means to reduce production costs and improve the competitiveness of their products. In the production process of lithium batteries, the positive and negative materials inside the lithium battery need to be activated through a certain charging and discharging method to improve the battery's charging and discharging performance and comprehensive performance such as self-discharge and storage. This process is called formation. The process of sorting the battery capacity and performance screening and grading by charging and discharging is called capacity separation. Lithium-ion battery charging and discharging equipment is one of the important production equipment in the production line of battery manufacturers. It is used in large quantities and requires huge investment.

[0003] The invention with publication number 117976994A discloses a battery charging and discharging linkage mechanism, which is provided with multiple charging and discharging mechanisms with needle beds at the top, battery trays at the bottom, and cylinders to adjust the distance between the needle beds and the battery trays. The structure is simple and takes up little space. However, cylindrical lithium-ion battery charging and discharging machines including this prior art mostly adopt parallel charging and discharging methods, which have the disadvantages of many control modules, large equipment investment, large equipment space, large amount of connecting cables, low efficiency, and low consistency of battery capacity during the manufacturing process due to different currents, which seriously restricts the direct production cost of lithium-ion batteries.

[0004] In view of the above problems existing in the existing cylindrical lithium-ion battery charger and discharger, the present invention proposes a series cylindrical lithium-ion battery charger and discharger. Summary of the invention

[0005] In view of the above problems, the present invention provides a series-connected cylindrical lithium-ion battery charging and discharging mechanism.

[0006] The series cylindrical lithium-ion battery charging and discharging mechanism comprises a rectangular bottom plate, wherein two opposite sides of the bottom plate are defined as the front side and the rear side, and the other two sides are defined as the left side and the right side; a left vertical plate perpendicular to the bottom plate is provided on the left side of the bottom plate, a right vertical plate perpendicular to the bottom plate is provided on the right side of the bottom plate, a top plate is connected to the top of the left vertical plate and the right vertical plate, and the top plate is parallel to the bottom plate; the bottom plate, the left vertical plate, the right vertical plate and the top plate are connected to form a rectangular parallelepiped frame; a vertical partition is connected between the top plate and the bottom plate, and the vertical partition divides the space inside the frame into a left compartment and a right compartment;

[0007] The left compartment is provided with two mechanism partitions connecting the left vertical plate and the vertical partition, the mechanism partitions divide the left compartment into three mechanism storage locations of equal height in the vertical direction, each of which is provided with a charging and discharging motion mechanism; the right compartment is provided with two component partitions connecting the right vertical plate and the vertical partition, the component partitions divide the right compartment into three component storage locations of equal height in the vertical direction, each of which is provided with a driving component;

[0008] The charging and discharging motion mechanism comprises a mechanism bottom frame, lower limit blocks are fixed on the left and right ends of the top of the mechanism bottom frame, and a mechanism middle frame is arranged on the top of the lower limit block; a battery tray is arranged in the center of the top of the mechanism middle frame, a number of batteries are loaded inside the battery tray, and tray limit blocks fixed on the mechanism middle frame are arranged on the left and right sides of the battery tray; vertical cylinder pull rods are arranged on the left and right ends of the mechanism middle frame, cylinders are arranged on the tops of the cylinder pull rods, and the tops of the cylinders are connected to the mechanism top frame; four vertical guide shafts are passed through the mechanism middle frame, the tops of the guide shafts are connected to the mechanism top frame, and the bottoms of the guide shafts are connected to the mechanism bottom frame; linear bearings are sleeved on the guide shafts, and the linear bearings are located on the top of the mechanism middle frame; a needle bed support block is arranged at the bottom of the mechanism top frame, and twelve needle beds flush on the left and right are fixed on the needle bed support block; a vertical upper limit rod is arranged at the bottom of the mechanism top frame;

[0009] The needle bed comprises a needle bed outer frame extending forward and backward, the needle bed outer frame comprises a needle bed top plate connected to the needle bed support block, the front side of the needle bed top plate is connected to the needle bed front vertical plate, and the rear side of the needle bed top plate is connected to the needle bed rear vertical plate; the lower end of the needle bed top plate is connected to a channel plate mounting bracket extending forward and backward, and the lower end of the channel plate mounting bracket is provided with three battery cutting channel plates arranged front and back between the needle bed front vertical plate and the needle bed rear vertical plate, and an intermediate support rod is connected between adjacent battery cutting channel plates; four groups of battery cutting circuits arranged from front to back are arranged inside the battery cutting channel plates, and four groups of probe assemblies arranged from front to back are arranged at the bottom of the battery cutting channel plates; the probe assemblies correspond one by one to the positions of the battery cutting circuits;

[0010] The probe assembly includes a vertically downward temperature needle, a positive probe and a negative probe; the temperature needle contains a temperature sensor, the positive probe includes a positive current needle and a positive voltage needle, and the negative probe includes a negative current needle and a negative voltage needle; the positive voltage needle and the negative voltage needle extend upward to the inside of the battery cut-in channel plate, the positive current needle faces downward to the positive pole ear of the battery, and the negative current needle faces downward to the negative pole ear of the battery; the positive voltage needle and the negative voltage needle are both connected to a voltage and temperature acquisition connector through an acquisition cable;

[0011] The battery cut-in circuit includes a positive current terminal and a negative current terminal, the positive current terminal is connected to the positive probe through a positive current line, and the negative current terminal is connected to the negative probe through a negative current line; the front end of the battery cut-in channel plate located at the frontmost side of the needle bed is provided with a transfer positive terminal, and the front ends of the two battery cut-in channel plates located at the rear side of the needle bed are provided with a transfer copper sheet; the transfer copper sheet connects the negative current terminal at the rearmost end of the front battery cut-in channel plate with the positive current terminal at the frontmost end of the rear battery cut-in channel plate; the front end of the transfer positive terminal is connected to the positive terminal of the needle bed, and the front side of the lower end of the outer frame of the needle bed is connected to the negative terminal of the needle bed led from the negative current terminal at the rearmost end of the needle bed;

[0012] The drive assembly includes an electrical bracket, a control box is provided on the top of the electrical bracket, and the control box contains control auxiliary electrical components and a controller, and the controller and the control auxiliary electrical components are electrically connected to the cylinder; a drive box is provided on the top of the control box; the drive box includes a drive box body, and two charge and discharge drive units are provided inside the drive box body; a high-voltage positive connector, a high-voltage negative connector, a drive positive connector, and a drive negative connector are provided at the front end of the charge and discharge drive unit; the drive positive connector of one of the charge and discharge drive units is connected to the positive terminal of the needle bed on the sixth needle bed from left to right, and the drive negative connector of the charge and discharge drive unit is connected to the positive terminal of the needle bed on the sixth needle bed from left to right, and the drive negative connector of the charge and discharge drive unit is connected to the positive terminal of the needle bed on the sixth needle bed from left to right. The negative terminal of the needle bed on the first needle bed on the right is connected; the driving positive connector of another charging and discharging driving unit is connected to the positive terminal of the needle bed on the twelfth needle bed from left to right, and the driving negative connector of the charging and discharging driving unit is connected to the negative terminal of the needle bed on the seventh needle bed from left to right; the positive terminals of the needle beds from the first to the fifth needle beds from left to right are connected to the negative terminals of the needle beds on the right side of the needle beds through wires; the positive terminals of the needle beds from the seventh to the eleventh needle beds from left to right are connected to the negative terminals of the needle beds on the right side of the needle beds through wires; the high-voltage positive connector and the high-voltage negative connector are both connected to a high-voltage DC power supply.

[0013] More specifically, the battery tray carries twelve rows and twelve columns of batteries.

[0014] More specifically, the left vertical plate and the mechanism partition are each provided with four hinges from top to bottom, and are connected to a double door via the hinges, a door handle is provided in the middle of the double door, and a heat dissipation fan is provided on the double door; the two double doors can be closed to close the left compartment.

[0015] More specifically, the right vertical plate is connected to a cabinet door via a hinge, and the cabinet door can be rotated to close the right compartment; the cabinet door is provided with a hollow iron mesh, a door handle, a main power switch and an indicator light.

[0016] The working steps of the present invention include: an external staff turns on the main power switch, the controller controls the cylinder to contract, and the cylinder is pulled upward until the upper limit rod contacts the middle frame of the mechanism; the battery tray rises with the middle frame of the mechanism and contacts the battery; the charging and discharging drive unit connects the battery, so that the batteries at the bottom of the first to sixth needle beds from left to right are connected in series, and the batteries at the bottom of the seventh to twelfth needle beds from left to right are connected in series, and the battery charging and discharging begins.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: a series charging and discharging method is used to supply power to a high-voltage DC bus, so that the charging and discharging currents of cylindrical lithium-ion batteries are highly consistent, which can improve the capacity consistency in the battery manufacturing process; the applicable voltage of the series circuit is higher than that of the parallel circuit, reducing the heat loss of the cable; the inverter conversion link from DC to AC is eliminated without reducing the battery charging and discharging efficiency, reducing the number of power devices and energy consumption; the needle bed integrates the probe and the battery cutting channel plate together, reducing the size of the mechanism, reducing the amount of cables used, and reducing the space occupied by the equipment; the needle bed has a high degree of modularity, a small size and is easy to operate, reducing the labor intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a structural diagram of the appearance of a series-connected cylindrical lithium-ion battery charging and discharging mechanism of the present invention.

[0019] Figure 2 It is the internal structure diagram of the present invention.

[0020] Figure 3 It is a structural diagram of the battery tray of the present invention.

[0021] Figure 4 It is a structural diagram of the charging and discharging motion mechanism of the present invention.

[0022] Figure 5 It is a structural diagram of the needle bed of the present invention.

[0023] Figure 6 It is a structural diagram of the battery cut-in circuit of the present invention.

[0024] Figure 7 It is a structural diagram of the drive box of the present invention.

[0025] Figure 8 It is a connection circuit diagram of the charge and discharge drive unit and the needle bed of the present invention. DETAILED DESCRIPTION

[0026] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0027] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] The present invention will be described in detail below in conjunction with exemplary embodiments with reference to the accompanying drawings.

[0033] A series cylindrical lithium-ion battery charging and discharging mechanism comprises a rectangular bottom plate 3, wherein two opposite sides of the bottom plate 3 are defined as a front side and a rear side, and the other two sides are defined as a left side and a right side; a left vertical plate 2 perpendicular to the bottom plate is provided on the left side of the bottom plate 3, a right vertical plate 5 perpendicular to the bottom plate is provided on the right side of the bottom plate, a top plate 1 is connected to the top of the left vertical plate 2 and the right vertical plate 5, and the top plate 1 is parallel to the bottom plate; the bottom plate, the left vertical plate, the right vertical plate and the top plate are connected to form a rectangular parallelepiped frame; a vertical partition plate 4 is connected between the top plate 1 and the bottom plate 3, and the vertical partition plate 4 divides the space inside the frame into a left compartment 17 and a right compartment 18;

[0034] The left compartment is provided with two mechanism partitions 10 connecting the left vertical plate 2 and the vertical partition 4, and the mechanism partition 10 divides the left compartment 17 into three mechanism storage locations of equal height in the vertical direction, and each mechanism storage location is provided with a charging and discharging movement mechanism 8; the right compartment 18 is provided with two component partitions 12 connecting the right vertical plate 5 and the vertical partition 4, and the component partition 12 divides the right compartment into three component storage locations of equal height in the vertical direction, and each component storage location is provided with a driving component 9;

[0035] The charging and discharging motion mechanism comprises a mechanism bottom frame 803, the left and right ends of the top of the mechanism bottom frame 803 are fixed with lower limit blocks 807, and the top of the lower limit block 807 is provided with a mechanism middle frame 802; a battery tray 14 is provided in the center of the top of the mechanism middle frame 802, and a plurality of batteries 15 are loaded in the battery tray 14, and tray limit blocks 808 fixed to the mechanism middle frame 802 are provided on the left and right sides of the battery tray 14; vertical cylinder pull rods 806 are provided at the left and right ends of the mechanism middle frame 802, and cylinders 804 are provided on the top of the cylinder pull rods 806, and the cylinders 804 are provided on the top of the cylinder pull rods 806. The top of the cylinder 804 is connected to the mechanism top frame 801; four vertical guide shafts 810 are inserted in the mechanism middle frame 802, the top of the guide shaft 810 is connected to the mechanism top frame 801, and the bottom of the guide shaft 810 is connected to the mechanism bottom frame 803; linear bearings 809 are sleeved on the guide shafts 810, and the linear bearings 809 are located at the top of the mechanism middle frame 802; a needle bed support block 812 is provided at the bottom of the mechanism top frame 801, and twelve needle beds 811 flush with each other are fixed on the needle bed support block 812; a vertical upper limit rod 805 is provided at the bottom of the mechanism top frame 801;

[0036] The needle bed comprises a needle bed outer frame 8113 extending forward and backward, the needle bed outer frame 8113 comprises a needle bed top plate 8130 connected to a needle bed support block, the front side of the needle bed top plate 8130 is connected to a needle bed front vertical plate 8114, and the rear side of the needle bed top plate 8130 is connected to a needle bed rear vertical plate 8117; the lower end of the needle bed top plate 8130 is connected to a channel plate mounting bracket 8118 extending forward and backward, and the lower end of the channel plate mounting bracket 8118 is provided with three battery cutting channel plates 8119 arranged front to back between the needle bed front vertical plate and the needle bed rear vertical plate, and an intermediate support rod 8116 is connected between adjacent battery cutting channel plates 8119; the battery cutting channel plates 8119 are provided with four groups of battery cutting circuits arranged from front to back, and the bottom of the battery cutting channel plates 8119 are provided with four groups of probe assemblies 8110 arranged from front to back; the probe assemblies 8110 correspond one by one to the positions of the battery cutting circuits;

[0037] The probe assembly 8110 includes a vertically downward temperature needle 8121, a positive probe 8119 and a negative probe 8120; the temperature needle 8121 contains a temperature sensor, the positive probe 8119 includes a positive current needle 8132 and a positive voltage needle 8122, and the negative probe 8120 includes a negative current needle 8131 and a negative voltage needle 8123; the positive voltage needle 8122 and the negative voltage needle 8123 extend upward to the inside of the battery cut-in channel plate 8119, the positive current needle 8132 faces downward to the positive pole ear of the battery 15, and the negative current needle 8123 faces downward to the negative pole ear of the battery 15; the positive voltage needle 8122 and the negative voltage needle 8123 are both connected to the voltage and temperature acquisition connector 8120 through an acquisition cable;

[0038] The battery cut-in circuit comprises a positive current terminal 8124 and a negative current terminal 8125, wherein the positive current terminal 8124 is connected to the positive probe 8119 via a positive current line 8127, and the negative current terminal 8125 is connected to the negative probe 8120 via a negative current line 8128; a forward connection positive terminal 8126 is provided at the front end of the battery cut-in channel plate 8119 located at the frontmost side of the needle bed, and a forward connection copper sheet 8129 is provided at the front end of the two battery cut-in channel plates 8119 located at the rear side of the needle bed; the forward connection copper sheet 8129 connects the negative current terminal at the rearmost end of the front battery cut-in channel plate with the positive current terminal 8124 at the frontmost end of the rear battery cut-in channel plate 8119; the forward connection positive terminal 8126 is connected to the needle bed positive terminal 8111, and the front side of the lower end of the needle bed outer frame 8113 is connected to the needle bed negative terminal 8112 drawn from the negative current terminal at the rearmost end of the needle bed;

[0039] The driving assembly comprises an electrical support 903, a control box is arranged on the top of the electrical support 903, and a control auxiliary electrical assembly 904 and a controller 902 are arranged inside the control box, and the controller 902 and the control auxiliary electrical assembly 904 are electrically connected to the cylinder 804; a driving box 901 is arranged on the top of the control box; the driving box 901 comprises a driving box body 9011, and two charging and discharging driving units 9010 are arranged inside the driving box body 9011; a high-voltage positive connector 9014, a high-voltage negative connector 9015, a driving positive connector 9012, and a driving negative connector 9013 are arranged at the front end of the charging and discharging driving unit 9010; the driving positive connector 9012 of one of the charging and discharging driving units is connected to the needle bed positive terminal 8111 on the sixth needle bed from left to right, and the charging and discharging driving unit 9010 The driving negative connector 9013 is connected to the needle bed negative terminal 8112 on the first needle bed from left to right; the driving positive connector 9012 of another charge and discharge driving unit is connected to the needle bed positive terminal 8111 on the twelfth needle bed from left to right, and the driving negative connector 9013 of the charge and discharge driving unit is connected to the needle bed negative terminal 8112 on the seventh needle bed from left to right; the needle bed positive terminals 8111 of the first to fifth needle beds from left to right are connected to the needle bed negative terminal 8112 on the needle bed on the right side of the needle bed through a wire; the needle bed positive terminals 8111 of the seventh to eleventh needle beds from left to right are connected to the needle bed negative terminal 8112 on the needle bed on the right side of the needle bed through a wire; the high-voltage positive connector 9014 and the high-voltage negative connector 9015 are both connected to a high-voltage DC power supply.

[0040] In some embodiments, the battery tray 14 carries twelve rows and twelve columns, for a total of 144 batteries 15 .

[0041] In some embodiments, the left vertical plate 2 and the mechanism partition 4 are each provided with four hinges 601 from top to bottom, and the left vertical plate 2 and the mechanism partition 4 are each connected to a double door 6 through the hinges, a door handle 603 is provided in the middle of the double door 6, and a heat dissipation fan 602 is provided on the double door; the two double doors 6 can be closed to close the left compartment.

[0042] In some embodiments, the right vertical plate 5 is connected to a cabinet door 7 via a hinge 601 , and the cabinet door 7 can be rotated to close the right compartment; the cabinet door is provided with a hollow iron mesh 701 , a door handle 603 , a main power switch 702 and an indicator light 703 .

[0043] The working steps of the present invention include: an external staff turns on the main power switch 702, the controller 902 controls the cylinder 804 to contract, and the cylinder 804 is pulled upward until the upper limit rod 805 contacts the middle frame 802 of the mechanism; the battery tray 14 rises with the middle frame of the mechanism and contacts the battery 15; the charging and discharging drive unit 9010 connects the battery 15, so that the batteries at the bottom of the first to the sixth needle beds 811 from left to right are connected in series, and the batteries at the bottom of the seventh to the twelfth needle beds 811 from left to right are connected in series, and the battery charging and discharging begins.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows: a series charging and discharging method is used to supply power to a high-voltage DC bus, so that the charging and discharging currents of cylindrical lithium-ion batteries are highly consistent, which can improve the capacity consistency in the battery manufacturing process; the applicable voltage of the series circuit is higher than that of the parallel circuit, reducing the heat loss of the cable; the inverter conversion link from DC to AC is eliminated without reducing the battery charging and discharging efficiency, reducing the number of power devices and energy consumption; the needle bed integrates the probe and the battery cutting channel plate together, reducing the size of the mechanism, reducing the amount of cables used, and reducing the space occupied by the equipment; the needle bed has a high degree of modularity, a small size and is easy to operate, reducing the labor intensity of the operator.

Claims

1. A series-connected cylindrical lithium-ion battery charging and discharging mechanism, characterized in that: The invention comprises a rectangular bottom plate, wherein two opposite sides of the bottom plate are defined as the front side and the back side, and the other two sides are defined as the left side and the right side; a left vertical plate perpendicular to the bottom plate is provided on the left side of the bottom plate, a right vertical plate perpendicular to the bottom plate is provided on the right side of the bottom plate, a top plate is connected to the top of the left vertical plate and the right vertical plate, and the top plate is parallel to the bottom plate; the bottom plate, the left vertical plate, the right vertical plate and the top plate are connected to form a rectangular parallelepiped rack; a vertical partition is connected between the top plate and the bottom plate, and the vertical partition divides the space inside the rack into a left compartment and a right compartment; The left compartment is provided with two mechanism partitions connecting the left vertical plate and the vertical partition, the mechanism partitions divide the left compartment into three mechanism storage locations of equal height in the vertical direction, each of which is provided with a charging and discharging motion mechanism; the right compartment is provided with two component partitions connecting the right vertical plate and the vertical partition, the component partitions divide the right compartment into three component storage locations of equal height in the vertical direction, each of which is provided with a driving component; The charging and discharging motion mechanism comprises a mechanism bottom frame, lower limit blocks are fixed on the left and right ends of the top of the mechanism bottom frame, and a mechanism middle frame is arranged on the top of the lower limit block; a battery tray is arranged in the center of the top of the mechanism middle frame, a number of batteries are loaded inside the battery tray, and tray limit blocks fixed on the mechanism middle frame are arranged on the left and right sides of the battery tray; vertical cylinder pull rods are arranged on the left and right ends of the mechanism middle frame, cylinders are arranged on the tops of the cylinder pull rods, and the tops of the cylinders are connected to the mechanism top frame; four vertical guide shafts are passed through the mechanism middle frame, the tops of the guide shafts are connected to the mechanism top frame, and the bottoms of the guide shafts are connected to the mechanism bottom frame; linear bearings are sleeved on the guide shafts, and the linear bearings are located on the top of the mechanism middle frame; a needle bed support block is arranged at the bottom of the mechanism top frame, and twelve needle beds flush on the left and right are fixed on the needle bed support block; a vertical upper limit rod is arranged at the bottom of the mechanism top frame; The needle bed comprises a needle bed outer frame extending forward and backward, the needle bed outer frame comprises a needle bed top plate connected to the needle bed support block, the front side of the needle bed top plate is connected to the needle bed front vertical plate, and the rear side of the needle bed top plate is connected to the needle bed rear vertical plate; the lower end of the needle bed top plate is connected to a channel plate mounting bracket extending forward and backward, and the lower end of the channel plate mounting bracket is provided with three battery cutting channel plates arranged front and back between the needle bed front vertical plate and the needle bed rear vertical plate, and an intermediate support rod is connected between adjacent battery cutting channel plates; four groups of battery cutting circuits arranged from front to back are arranged inside the battery cutting channel plates, and four groups of probe assemblies arranged from front to back are arranged at the bottom of the battery cutting channel plates; the probe assemblies correspond one by one to the positions of the battery cutting circuits; The probe assembly includes a vertically downward temperature needle, a positive probe and a negative probe; the temperature needle contains a temperature sensor, the positive probe includes a positive current needle and a positive voltage needle, and the negative probe includes a negative current needle and a negative voltage needle; the positive voltage needle and the negative voltage needle extend upward to the inside of the battery cut-in channel plate, the positive current needle faces downward to the positive pole ear of the battery, and the negative current needle faces downward to the negative pole ear of the battery; the positive voltage needle and the negative voltage needle are both connected to a voltage and temperature acquisition connector through an acquisition cable; The battery cut-in circuit includes a positive current terminal and a negative current terminal, the positive current terminal is connected to the positive probe through a positive current line, and the negative current terminal is connected to the negative probe through a negative current line; the front end of the battery cut-in channel plate located at the frontmost side of the needle bed is provided with a transfer positive terminal, and the front ends of the two battery cut-in channel plates located at the rear side of the needle bed are provided with a transfer copper sheet; the transfer copper sheet connects the negative current terminal at the rearmost end of the front battery cut-in channel plate with the positive current terminal at the frontmost end of the rear battery cut-in channel plate; the front end of the transfer positive terminal is connected to the positive terminal of the needle bed, and the front side of the lower end of the outer frame of the needle bed is connected to the negative terminal of the needle bed led from the negative current terminal at the rearmost end of the needle bed; The drive assembly includes an electrical bracket, a control box is provided on the top of the electrical bracket, the control box includes control auxiliary electrical components and a controller, and a drive box is provided on the top of the control box; the drive box includes a drive box body, and two charge and discharge drive units are provided inside the drive box body; a high-voltage positive connector, a high-voltage negative connector, a drive positive connector, and a drive negative connector are provided at the front end of the charge and discharge drive unit; the drive positive connector of one of the charge and discharge drive units is connected to the positive terminal of the needle bed on the sixth needle bed from left to right, and the drive negative connector of the charge and discharge drive unit is connected to the needle bed on the first needle bed from left to right. The positive terminal of the needle bed is connected to the negative terminal of the needle bed; the positive driving connector of another charge and discharge drive unit is connected to the positive terminal of the needle bed on the twelfth needle bed from left to right, and the negative driving connector of the charge and discharge drive unit is connected to the negative terminal of the needle bed on the seventh needle bed from left to right; the positive terminals of the needle beds from the first to the fifth needle beds from left to right are connected to the negative terminals of the needle beds on the needle beds on the right side of the needle beds through wires; the positive terminals of the needle beds from the seventh to the eleventh needle beds from left to right are connected to the negative terminals of the needle beds on the needle beds on the right side of the needle beds through wires; the high-voltage positive connector and the high-voltage negative connector are both connected to a high-voltage DC power supply.

2. A series-connected cylindrical lithium-ion battery charging and discharging mechanism according to claim 1, characterized in that: The battery tray is loaded with twelve rows and twelve columns of batteries.

3. A series-connected cylindrical lithium-ion battery charging and discharging mechanism according to claim 2, characterized in that: The left vertical plate and the mechanism partition are both provided with four hinges from top to bottom, and are both connected with a double door through the hinges, a door handle is provided in the middle of the double door, and a heat dissipation fan is provided on the double door; the two double doors can be closed to close the left compartment.

4. A series-connected cylindrical lithium-ion battery charging and discharging mechanism according to claim 3, characterized in that: The right vertical plate is connected with a cabinet door through a hinge, and the cabinet door can be rotated to close the right compartment; the cabinet door is provided with a hollow iron mesh, a door handle, a main power switch and an indicator light.

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